A fascinating tool for moving heat from one place to another is the heat pipe.

Three pipes—a heat pipe, a copper pipe, and a stainless steel pipe—make up the equipment. All of the pipes are identical in size. The performance of heat pipes is compared using copper and stainless steel pipes. All pipes are vertically installed, with a heat sink filled with water at the upper end and a band heater at the bottom end. The heat pipe's almost isothermal operation can be plainly seen from the pipe's longitudinal temperature distribution.

SPECIFICATIONS:

• Heat pipe – Stainless Steel pipe, 25 mm O.D., 450 mm. Long. Sealed at both ends, evacuated and filled partially with distilled water – one No.
• Copper and stainless steel pipe of same size as that of heat pipe – one each.
• Equal capacity heater at bottom end of each pipe.
• Water filled heat sinks at upper end of each pipe.

Measurements and controls –

• Dimmerstat to control heat input to all the heaters – 4 amp. Capacity One No.
• A voltmeter and an ammeter to measure input to heaters One each.
• Multichannel digital temperature indictor to measure temperatures along the length of pipes.Four
• thermocouples are provided on each pipe.
• Thermometers to note down water temperatures in heat sinks – 3 Nos.

Services Required :

• 230 VA.C. Single Phase supply.
• Floor Area = 1 m X 0.5m X 0.5 m height.